Mryntu

I have created a custom email template. I'm using transport builder to send the email, but for some strange reason the email is empty. To send email I'm using mageplaza-magento-2-smtp extension. Below my code:

etc/config.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
 <default>
 <newsletter>
 <referral>
 <invite_friend_email_template>
 newsletter_referral_invite_friend_email_template
 </invite_friend_email_template>
 </referral>
 </newsletter>
 </default>
</config>

etc/email_templates.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Email:etc/email_templates.xsd">
 <template id="newsletter_referral_invite_friend_email_template"
 label="Invite Friend Email"
 file="invite_friend.html"
 type="html"
 module="Ped_Referral"
 area="frontend"/>
</config>

view/frontend/email/invite_friend.html

<!--@subject trans "You have been invited to register" @-->

template config_path="design/email/header_template"

<p>
 trans "You have been invited to register" 
</p>

template config_path="design/email/footer_template"

Controller action to send email

<?php
declare(strict_types=1);

namespace PedReferralControllerCustomer;

use MagentoCustomerModelSession;
use MagentoFrameworkAppActionContext;
use MagentoFrameworkAppArea;
use MagentoFrameworkAppConfigScopeConfigInterface;
use MagentoFrameworkDataFormFormKeyValidator;
use MagentoFrameworkExceptionLocalizedException;
use MagentoFrameworkExceptionMailException;
use MagentoFrameworkTranslateInlineStateInterface;
use MagentoNewsletterModelQueueTransportBuilder;
use MagentoStoreModelScopeInterface;
use MagentoStoreModelStore;
use MagentoStoreModelStoreManagerInterface;
use PedReferralControllerCustomer;
use PsrLogLoggerInterface;
use MagentoFrameworkAppResponseInterface;
use MagentoFrameworkControllerResultRedirect;
use MagentoFrameworkControllerResultInterface;
use MagentoFrameworkExceptionNoSuchEntityException;

class Invite extends Customer
ResultInterface
 */
 public function execute()
 
 $resultRedirect = $this->resultRedirectFactory->create();

 if (!$this->validateFormKey()) 
 return $resultRedirect->setRefererUrl();
 

 $email = $this->getRequest()->getParam('email');

 try 
 $this->validateParams();

 $this->inlineTranslation->suspend();
 $this->sendMessage($email);
 $this->inlineTranslation->resume();

 $this->logger->info('Sent referral email message to ' . $email);
 $this->messageManager->addSuccessMessage(__('Email sent successfully'));
 catch (LocalizedException $e) 
 $this->messageManager->addErrorMessage($e->getMessage());
 catch (Exception $e) 
 $this->logger->critical($e);
 $this->messageManager->addErrorMessage(
 __('An error occurred while processing your form. Please try again later.')
 );
 

 return $resultRedirect->setPath('referral/customer/index');
 

Why do I receive a blank email? (without subject neither body)